A research jointly conducted by the Centre for Disease Control and Prevention, U.S. Food and Drug Administration and the U.S. Environmental Protection Agency clearly stated that there are no difference in the level of mercury in hair in subjects with or without hair dye.

We have provided our testing service to the University of Hong Kong in a research of autism and mercury exposure. Results indicate that Hong Kong children’s exposure to mercury is higher than adults in European Countries or U.S. Also, the level of mercury in hair is higher in autistic children than that of normal children.